Which of the following $3 d -m e t a l$ ion will give the lowest enthalpy of hydration $(\Delta_{ hyd } H )$ when dissolved in water?

  • [JEE MAIN 2022]
  • A

    $Cr ^{2+}$

  • B

    $Mn ^{2+}$

  • C

    $Fe ^{2+}$

  • D

    $Co ^{2+}$

Similar Questions

For the following Assertion and Reason, the correct option is

Assertion : For hydrogenation reactions, the catalytic activity increases from Group $5$ to Group $11$ metals with maximum activity shown by Group $7-9$ elements.

Reason : The reactants are most strongly adsorbed on group $7-9 $ elements.

  • [JEE MAIN 2020]

The spin only magnetic moments (in $BM$) for free $\mathrm{Ti}^{3+}, \mathrm{V}^{2+}$ and $\mathrm{Sc}^{3+}$ ions respectively are (At.No. $Sc: 21; Ti : 22; V : 23)$

  • [JEE MAIN 2021]

Which of the following statements is incorrect?

Which of the following have highest melting point

Electrons in a paramagnetic compound are